I am seeing the same behavior on real hardware after upgrading to Ubuntu 21.10.
This is what I see on the logs after connecting a TOSHIBA SSD in a SATAtoUSB enclosure (I plugged it two times, at 12:08 and 12:09): 12:09:16 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:133' failed with exit code 1. 12:09:16 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:133' failed with exit code 1. 12:09:16 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_arm64 /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:133' failed with exit code 1. 12:09:16 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_arm /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:133' failed with exit code 1. 12:09:16 mtp-probe: bus: 2, device: 6 was not an MTP device 12:09:16 mtp-probe: bus: 2, device: 6 was not an MTP device 12:09:16 mtp-probe: checking bus 2, device 6: "/sys/devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3" 12:09:16 systemd-udevd: 2-2.3:1.0: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3/2-2.3:1.0 0:0' failed with exit code 1. 12:09:16 mtp-probe: bus: 2, device: 6 was not an MTP device 12:09:16 kernel: scsi host9: uas 12:09:16 kernel: usb 2-2.3: SerialNumber: 000000123AE3 12:09:12 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper remove snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:132' failed with exit code 1. 12:09:12 kernel: sd 9:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK 12:09:12 kernel: usb 2-2.3: USB disconnect, device number 5 12:08:47 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:132' failed with exit code 1. 12:08:47 kernel: sd 9:0:0:0: [sda] Attached SCSI disk 12:08:47 kernel: sda: sda1 12:08:47 mtp-probe: bus: 2, device: 5 was not an MTP device 12:08:47 systemd-udevd: 2-2.3:1.0: Process '/usr/lib/snapd/snap-device-helper bind snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3/2-2.3:1.0 0:0' failed with exit code 1. 12:08:47 mtp-probe: bus: 2, device: 5 was not an MTP device 12:08:47 kernel: sd 9:0:0:0: [sda] Optimal transfer size 33553920 bytes 12:08:47 mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3" 12:08:47 kernel: scsi 9:0:0:0: Direct-Access TOSHIBA THNSNH128GBS HTRA PQ: 0 ANSI: 6 12:08:47 kernel: usb 2-2.3: SerialNumber: 000000123AE3 12:08:43 systemd-udevd: 2-2.3: Process '/usr/lib/snapd/snap-device-helper remove snap_qemu-virgil_qemu-virgil /devices/pci0000:00/0000:00:01.3/0000:02:00.0/usb2/2-2/2-2.3 189:130' failed with exit code 1. 12:08:43 kernel: sd 9:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK 12:08:43 udisksd: Cleaning up mount point /media/nicolas/SSD128 (device 8:1 no longer exists) 12:08:43 kernel: sd 9:0:0:0: [sda] Synchronizing SCSI cache 12:08:43 kernel: usb 2-2.3: USB disconnect, device number 3 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to udisks2 in Ubuntu. https://bugs.launchpad.net/bugs/1946525 Title: Disks are not being mounted automatically Status in udisks2 package in Ubuntu: Incomplete Bug description: 1) Ubuntu Desktop amd 64 20211008.1 daily build 2) udisks 2.9.4-1 3) Inserted disks, in this case the Ubuntu and VirtualBox Guest Additions disk images, should be mounted automatically 4) the automount feature seems to be gone or non-functional in the last couple of days ProblemType: Bug DistroRelease: Ubuntu 21.10 Package: udisks2 2.9.4-1 ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13 Uname: Linux 5.13.0-16-generic x86_64 ApportVersion: 2.20.11-0ubuntu70 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME CustomUdevRuleFiles: 70-snap.firefox.rules 70-snap.core.rules 60-vboxadd.rules 70-snap.snap-store.rules Date: Sat Oct 9 01:37:13 2021 InstallationDate: Installed on 2021-10-08 (0 days ago) InstallationMedia: Ubuntu 21.10 "Impish Indri" - Daily amd64 (20211008.1) Lsusb: Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Lsusb-t: /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/12p, 12M |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M MachineType: innotek GmbH VirtualBox ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-16-generic root=UUID=d07fdf87-8838-4ac4-889b-0ae8cdf3ebb5 ro quiet splash SourcePackage: udisks2 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:sku:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.family: Virtual Machine dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks2/+bug/1946525/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp